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A Study to Evaluate the Source of a "Gummy Smile" in Different Racial Groups

Official Title: Prevalence of excessive gingival display etiologies in different racial groups

This study is being done to try to find out if there are differences among people in how much their upper lip rises during smiling, in how people feel about their smiles and about the amount of gum showing in their smiles, depending on what race they identify as.

Oral Bacteria Transmission from Mother to Child (Seeking Mothers with Adopted Children)

Official Title: Contribution of Genetics to Oral Bacterial Transmission from Mothers to Babies: a Study of Biologic and Adoptive Mother-Child Dyads

The purpose of this study is to determine how young children get normal mouth bacteria and how it might be passed from mother to child. Researchers want to compare the adoptive mother-child pairs with biologic mother-child pairs to see how closely the bacteria of each set of mothers match those of t...

Gum Study: A Dental Study for Smokers and Non-Smokers

Official Title: Gum Study - Tobacco smoking and perturbations in the subgingival microbial ecosystem

Gum Study - Tobacco smoking and perturbations in the subgingival microbial ecosystem The purpose of this study is to examine how quitting smoking changes the type of bacteria that live in peoples' mouths and under their gumline.